THEME:   none, but two triples and two quads at the corners   
GOOD ONES:     It's just one thing after another   SERIES   
Rock fan's subj.   GEOL.   
Tired sounding veggie   BEET   
Face with hands, maybe   DIAL [if it's not a watch it's a monster]   
Unloose?   SNUG [not a Brit's call to free the hounds]   
It's never right   ACUTE ANGLE [I always found those angles cute   

  ]   
Working out well?   FIT   
What an apostrophe may stand for   NINETEEN [as in '76, our 200th anniversary]      
BTW:   They often include 
materials   SPECS [no they don't --- if you mean the materials and not a 
list of materials]      
Challenging clues throughout made this one great fun.         
RATING: 
 
 
   Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun